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There are 13 fifteen-letter words containing H, L, N, 2O, P, S and Y

AEROHYDROPLANESAEROHYDROPLANE n. a winged hydroplane or flying-boat.
HYDROXYPROLINEShydroxyprolines n. Plural of hydroxyproline.
HYDROXYPROLINE n. an amino acid.
HYPERSOMNOLENCEhypersomnolence n. (Medicine) Excessive sleepiness.
HYPERSOMNOLENCE n. the state of being excessively sleepy.
IONOSPHERICALLYionospherically adv. In terms of the ionosphere.
IONOSPHERIC adv. relating to the ionosphere.
LYOPHILISATIONSlyophilisations n. Plural of lyophilisation.
LYOPHILISATION n. freeze-drying, also LYOPHILIZATION.
LYOPHILIZATIONSlyophilizations n. Plural of lyophilization.
LYOPHILIZATION n. freeze-drying, also LYOPHILISATION.
NEUROPHYSIOLOGYneurophysiology n. (Physiology, neuroscience) The branch of physiology that deals with the nervous system.
NEUROPHYSIOLOGY n. the physiology of the nervous system.
NEUROPSYCHOLOGYneuropsychology n. A branch of neurology and of clinical psychology that investigates the physiological basis of psychological processes.
neuropsychology n. The facts uncovered thereby, or the body of knowledge thus produced.
NEUROPSYCHOLOGY n. the study of the relation between brain and behaviour.
PHARYNGOLOGISTSpharyngologists n. Plural of pharyngologist.
PHARYNGOLOGIST n. a specialist in pharyngology, the study of the throat.
PHOSPHORYLATINGphosphorylating v. Present participle of phosphorylate.
phosphorylating adj. That phosphorylates.
PHOSPHORYLATE v. to cause (an organic compound) to take up or combine with phosphoric acid or a phosphorus-containing group.
PHOSPHORYLATIONphosphorylation n. (Biochemistry) the process of transferring a phosphate group from a donor to an acceptor; often catalysed by enzymes.
PHOSPHORYLATION n. the process of phosphorylating a chemical compound.
POLYPHLOESBOEANpolyphloesboean adj. (Poetic) Loudly roaring; used to describe the ocean.
POLYPHLOESBOEAN adj. loud-roaring, also POLYPHLOISBIC.
ULTRASONOGRAPHYultrasonography n. (Medicine) The use of ultrasound to produce diagnostic images of the internal organs of the body, or of a foetus.
ultrasonography n. The use of ultrasound to form images of underwater structures.
ULTRASONOGRAPHY n. the use of ultrasound.

Scrabble words — in black are valid world wide — in RED are not valid in North America — in GREEN are valid only in North America.
Definitions are short excerpt from the WikWik.org and 1Word.ws.

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See this list for:

  • English Wiktionary: 119 words
  • Scrabble in French: 13 words
  • Scrabble in Spanish: no word
  • Scrabble in Italian: no word
  • Scrabble in German: no word
  • Scrabble in Romanian: no word


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